Support plate



FIG. 1 is a perspective view of a support plate showing our new design; the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is front view thereof;

FIG. 5 is a back side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a support plate, as shown and described. 